Fix a typo (are -> as) in the introduction paragraph of
Documentation/block/queue-sysfs.rst.

Signed-off-by: Damien Le Moal <redacted>
---
  Documentation/block/queue-sysfs.rst | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/block/queue-sysfs.rst b/Documentation/block/queue-sysfs.rst
index b6e8983d8eda..e8c74306f70a 100644
--- a/Documentation/block/queue-sysfs.rst
+++ b/Documentation/block/queue-sysfs.rst

@@ -4,7 +4,7 @@ Queue sysfs files
  
  This text file will detail the queue files that are located in the sysfs tree
  for each block device. Note that stacked devices typically do not export
-any settings, since their queue merely functions are a remapping target.
+any settings, since their queue merely functions as a remapping target.
  These files are the ones found in the /sys/block/xxx/queue/ directory.
  
  Files denoted with a RO postfix are readonly and the RW postfix means